108772509 has 4 divisors (see below), whose sum is σ = 145030016. Its totient is φ = 72515004.

The previous prime is 108772471. The next prime is 108772513. The reversal of 108772509 is 905277801.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 108772509 - 2⁷ = 108772381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108772529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18128749 + ... + 18128754.

It is an arithmetic number, because the mean of its divisors is an integer number (36257504).

Almost surely, 2^108772509 is an apocalyptic number.

It is an amenable number.

108772509 is a deficient number, since it is larger than the sum of its proper divisors (36257507).

108772509 is an equidigital number, since it uses as much as digits as its factorization.

108772509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36257506.

The product of its (nonzero) digits is 35280, while the sum is 39.

The square root of 108772509 is about 10429.4059754139. The cubic root of 108772509 is about 477.3530649937.

The spelling of 108772509 in words is "one hundred eight million, seven hundred seventy-two thousand, five hundred nine".